Automatic telecommunication switching systems



Sept. 13, 1966 B. J. WARMAN 3,272,924

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1. A SWITCHING ARRANGEMENT FOR AN AUTOMATIC TELECOMMUNICATION EXCHANGE COMPRISING SWITCHING EQUIPMENT PERMITTING SELECTIVE ESTABLISHMENT OF COMMUNICATION PATH BETWEEN LINES CONNECTED TO THE EXCHANGE, A PLURALITY OF SWITCHING SECTIONS CONSTITUTED BY RESPECTIVE SUB-DIVISIONS OF SAID SWITCHING EQUIPMENT, CONNECTIONS AFFORDING ACCESS OF EACH LINE TO A PLUARLITY OF SAID SECTIONS, THE SWITCHING EQUIPMENT IN EACH SECTION AFFORDING A PLURALITY OF SELECTABLE ROUTES THROUGH IT AS PORTIONS OF SUCH COMMUNICATION PATHS, THE ROUTES THROUGH EACH SECTION BEING SEPARATE FROM AN INDEPENDENT OF THE OTHER SECTIONS, A PLURALITY OF LINKS CONNECTED TO THE SWITCHING SECTIONS AND CO-OPERATING THEREWITH IN PROVIDING BETWEEN ANY TWO OF SAID LINES A PLURALITY OF POSSIBLE COMMUNICATION PATHS EACH COMPRISING INCOMING AND OUTGOING PORTIONS INTERCONNECTED BY ONE OF SAID LINKS WITH THE INCOMING PORTIONS OF THE SEVERAL PATHS EXTENDING OVER RESPECTIVE ROUTES IN DIFFERENT SECTIONS AND LIKEWISE THE OUTGOING PORTIONS OF THE SEVERAL PATHS EXTENDING OVER RESPECTIVE ROUTES IN DIFFERENT SECTIONS AND A SECTION SELECTING ARRANGEMENT COMPRISING MEANS OPERABLE IN RESPECT OF A CALL BETWEEN TWO LINES FOR ASCERTAINING PERTINENT CONDITIONS IN THE SEVERAL SECTIONS, MEANS FOR SELECTING FROM SAID PATH PORTIONS IN ACCORDANCE WITH THE SO ASCERTAINED CONDITIONS AN INCOMING PATH PORTION AND AN OUTGOING PATH PORTION FOR A COMMUNICATION PATH BETWEEN THE CALL LINES, AND MEANS FOR ESTABLISHING THIS COMMUNICATION PATH OVER THE SELECTED PATH PORTIONS AND THE LINK WHICH INTERCONNECTS THEM. 